Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2025, V. 22, No. 5, pp. 444-448
Land cover dynamics in the southern part of Kamchatka Peninsula during the July 30, 2025, earthquake according to Sentinel-1 SAR data
L.N. Zakharova
1 , A.I. Zakharov
1 1 Kotelnikov Institute of Radioengineering and Electronics RAS, Fryazino Branch, Fryazino, Moscow Region, Russia
Accepted: 04.10.2025
DOI: 10.21046/2070-7401-2025-22-5-444-448
Relaxation of the accumulated tectonic stress near the Pacific Plate subduction zone during the July 30, 2025, earthquake resulted in a significant land-surface shift on the southeastern coast of the Kamchatka Peninsula. In this study, spaceborne radar interferometry technique was used to measure horizontal and vertical land surface displacements south of Petropavlovsk-Kamchatsky. Interferometric pairs of images acquired by the Sentinel-1 synthetic aperture radar from the satellite ascending and descending orbits were used in the study. Due to the interferometric measurements of the slant range variations between images, the radial displacements were estimated and the maps of horizontal and vertical displacements of the scattering covers following the July 30, 2025, earthquake were formed. The maximum horizontal land surface displacement of 1.7 m with 0.2 m subsidence was observed on the eastern coast of the southern tip of the peninsula.
Keywords: synthetic aperture radar, interferometry, fault, earthquake, surface displacements
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